Held at the Metropolitan Museum of Art in New York City all eyes were on Sienna Miller, who looked every inch the yummy mummy in her white open-backed Burberry dress and studded cropped biker jacket.

Celebs at Punk theme party

Singer Rita Ora arrives at the Metropolitan Museum of Art Costume Institute Benefit celebrating the opening of "PUNK: Chas to Couture" in New York.

Celebs at Punk theme party

Singer and actress Miley Cyrus arrives at the Metropolitan Museum of Art Costume Institute Benefit celebrating the opening of "PUNK: Chaos to Couture" in New York.

Celebs at Punk theme party

Model Gisele Bundchen arrives at the Metropolitan Museum of Art Costume Institute Benefit celebrating the opening of "PUNK: Chaos to Couture" in New York.

Celebs at Punk theme party

Actress Sarah Jessica Parker arrives at the Metropolitan Museum of Art Costume Institute Benefit celebrating the opening of "PUNK: Chaos to Couture" in New York.

Celebs at Punk theme party

Actress Emilia Clarke arrives at the Metropolitan Museum of Art Costume Institute Benefit celebrating the opening of "PUNK: Chaos to Couture" in New York.

Celebs at Punk theme party

Singer Beyonce arrives at the Metropolitan Museum of Art Costume Institute Benefit celebrating the opening of "PUNK: Chaos to Couture" in New York.

Celebs at Punk theme party

Actress Christina Ricci arrives at the Metropolitan Museum of Art Costume Institute Benefit celebrating the opening of "PUNK: Chaos to Couture" in New York.

Celebs at Punk theme party

Actress Kate Bosworth arrives at the Metropolitan Museum of Art Costume Institute Benefit celebrating the opening of "PUNK: Chaos to Couture" in New York.